Arsenal have been totally deserted by punters ahead of their first leg Round-of-16 Champions League home tie against German giants Bayern Munich on Tuesday [Wednesday morning Australian time].

The Gunners are coming off a humiliating home loss to Championship side Blackburn in the FA Cup - the second time they have fallen to lower-league opposition in a domestic cup match this season, after bowing out to fourth-tier outfit Bradford in the League Cup.

Bayern Munich, four-time winners of the competition, in contrast are absolutely flying and sit a massive 15 points clear in the race for the Bundesliga title.

In fact, Bayern have won their past 11 matches in all competitions, 18 of their last 22 games overall and 10 of their 11 away matches in the Bundesliga this season.

Betfair's Daniel Bevan said it is rare for an English club to be such underdogs on home soil, with Bayern having attracted over 80 percent of money wagered on the game so far, having firmed from $2.38.

The Gunners in contrast have drifted from as low as $2.60 and are also at big odds - although not quite as big as at Betfair - of $3.70 at Eskander's Betstar and $3.75 at Centrebet.

But Bayern have failed to beat Arsenal in London in their two previous visits and so often seem to self-destruct against English teams, as evidenced by their capitulation in the 1999 and 2012 Champions League finals against Manchester United and Chelsea respectively when they squandered winning positions.

Arsenal will also be bolstered by the fresh trio of Jack Wilshere, Theo Walcott and Santi Cazorla, who all started on the bench against Blackburn to save them for the Champions League tie.

But defence remains Arsenal's Achilles heel and Bayern's in-form striker Mario Mandzukic will take a power of stopping after he scored his sixth goal in four matches, to move to 17 for the Bundesliga season, in last Saturday's 2-0 win over Wolfsburg.

But the Gunners remain fantastic value to win the first leg at home, particularly in correct-score betting where a 2-1 Arsenal win at odds of $14 is very tempting.

Meanwhile in the other game on Tuesday, Primeira Liga leaders and 2004 champions Porto look a safe bet at home at odds of $1.83 at Betfair against Spanish club Malaga at odds of $5.30, with the draw paying $3.70.

* Note prices subject to change

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